CN106731852B - A kind of board-like vacuum membrane distillation evaporator and application - Google Patents
A kind of board-like vacuum membrane distillation evaporator and application Download PDFInfo
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- CN106731852B CN106731852B CN201710164727.7A CN201710164727A CN106731852B CN 106731852 B CN106731852 B CN 106731852B CN 201710164727 A CN201710164727 A CN 201710164727A CN 106731852 B CN106731852 B CN 106731852B
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- 239000012528 membrane Substances 0.000 title claims abstract description 109
- 238000004821 distillation Methods 0.000 title claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 239000013535 sea water Substances 0.000 claims abstract description 18
- 238000010612 desalination reaction Methods 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims description 33
- 238000012856 packing Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 26
- 230000008676 import Effects 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000012267 brine Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000009291 secondary effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000009834 vaporization Methods 0.000 abstract description 4
- 230000008016 vaporization Effects 0.000 abstract description 4
- 230000000875 corresponding effect Effects 0.000 description 18
- 238000001704 evaporation Methods 0.000 description 15
- 230000008020 evaporation Effects 0.000 description 14
- 239000013505 freshwater Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000007701 flash-distillation Methods 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241000052343 Dares Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/364—Membrane distillation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention relates to a kind of board-like vacuum membrane distillation evaporator and applications, the evaporator includes the steam admission side end plate in left side and the steam output side end plate on right side, it is arranged successively and is equipped with by secondary steam channel sealing ring from left to right between steam admission side end plate and steam output side end plate, plate membrane sheet frame, feed liquid passage sealing ring, heat exchanger fin sheet frame, heater steam channel sealing ring, heat exchanger fin sheet frame, the film block that feed liquid passage sealing ring and plate membrane sheet frame joint are constituted, multiple modules are successively arranged to make up membrane stack by the connection of secondary steam channel sealing ring, the application of the evaporator is that evaporator is combined to the Multi-effect plate type film distilling seawater desalination system for being assembled into high-efficiency compact, the present invention realizes the cascade utilization of the membrane distillation latent heat of vaporization and greatly improving for the thermal efficiency, and make device compact efficient, the thermal efficiency is high, the advantages that water generation ratio is big.
Description
Technical field
The invention belongs to sea water desalination and technical field of membrane separation, especially a kind of board-like vacuum membrane distillation evaporator and answer
With.
Background technique
Fresh water is one of the base substance that human society is depended on for existence and development, with the development of economy with the increase of population
And water pollution is got worse, there is different degrees of water shortage problem in many countries and regions, and the whole world, which is faced with, to be got worse
Water resources crisis.
Sea water desalination is one of the important channel for solving freshwater resources crisis.At present frequently with such as multi-effect distilling, multistage
The technologies such as flash distillation, reverse osmosis and freezing carry out seawater desalination.Membrane distillation (MD) is as emerging membrane separation technique, in sea water desalination
Field is concerned.Compared with the conventional methods such as multi-effect distilling, multistage flash distillation, MD has potential competitive advantage.
Membrane distillation be using dewatering microporous film as medium, in film two sides under the action of steam pressure difference, volatile component in feed liquid
Fenestra is penetrated in vapour form, to realize that liquid matter separates.Therefore, film distillation technology is organically to combine distillation and UF membrane
The characteristics of, evaporation, mass transfer during membrane distillation in existing conventional distil-lation, condensation process, and there is separate substance diffusion to penetrate
The membrane separating process of film, so that the technology be made to have, separative efficiency is high, operating condition is mild, interacts between film and material liquid
And the advantages such as mechanical property requirements are low of film, there is preferable application prospect in sea water desalination and field of industrial waste water treatment.Vacuum
Membrane distillation (VMD) has many advantages, such as that flux is big, heat loss is small, and application prospect is the most wide.
Membrane distillation is a membrane separating process based on evaporating, and heat is transmitted in a manner of phase-change heat transfer from feed liquid side
Then to infiltration, thus energy consumption is higher.In addition, the output of high temperature fresh water and strong brine after membrane distillation, has been further exacerbated by heat waste
It loses.This is also to limit one of critical issue of its industrial applications.Membrane distillation can be improved by the recycling of the latent heat of vaporization
The thermal efficiency, but conventional method is to carry out in such a way that feed liquid absorbs sensible heat, and latent heat is much larger than sensible heat, so that feed liquid flow
It is very big, need more power consumptions.The recycling of heat how is realized from technique and recycling and reduces power consumption
It is a new hot spot of current membrane distillation research and application.The coupling of film distillation technology and other technologies is also its development and application
One of emphasis direction.Multiple-effect evaporation technology is steamed previous stage evaporation process institute's producing steam as the heating of rear stage evaporation process
Vapour realizes the chemical engineering unit operation that the latent heat of vaporization of heat source (steam) is repeatedly transmitted in a manner of evaporation-condensation.Multiple-effect evaporation is drawn
Enter membrane distillation process, implement the multiple-effect of membrane distillation process, is the developing direction for realizing membrane distillation heat recovery.In addition, film steams
Evaporate the application in sea water desalination also need to solve membrane module be not easy to extend, not easy cleaning, produce the problems such as water small scale.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, and proposes a kind of board-like vacuum membrane distillation evaporator and answer
With.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of board-like vacuum membrane distillation evaporator, the steam output side end plate of steam admission side end plate and right side including left side, into
It is arranged successively from left to right between vapour side end panel and steam output side end plate and is equipped with by plate membrane sheet frame, feed liquid passage sealing ring, changes
What backing sheet frame, heater steam channel sealing ring, heat exchanger fin sheet frame, feed liquid passage sealing ring and plate membrane sheet frame joint were constituted
Film block, multiple modules are successively arranged to make up membrane stack by the connection of secondary steam channel sealing ring；Membrane stack and steam admission side end plate and out vapour
Side end panel also uses secondary steam channel sealing ring to connect.
Wherein, the steam admission side end plate includes that the heating steam inlet on top is arranged in and the condensed water of lower part is arranged in go out
Mouthful, the top of condensation-water drain is provided with fixed gas outlet, pull rod location hole is provided in steam admission side end plate four corners, at steam admission side end
Plate two sides are provided with symmetrical material liquid outlet；Wherein, the steam output side end plate includes secondary steam outlet, the setting that two sides are arranged in
Lower part two sides liquor inlet and the pull rod location holes of four corners is set, the pull rod location hole of steam admission side end plate four corners with
The pull rod position of positioning hole of steam output side end plate four corners is corresponding, and in position, corresponding pull rod positioning hole will be into vapour after installing pull rod
Kernel membrane stack between side end panel and steam output side end plate compresses；
Wherein, the plate membrane sheet frame and heat exchanger fin sheet frame include sheet frame, square hole are formed among sheet frame, in square hole
It is formed with the mesh-supported part affixed with square hole edge, plate membrane sheet frame is constituted after plate membrane is fixedly mounted on mesh-supported part, in net
Be fixedly mounted on shape supporting element after heat exchanger fin and constitute heat exchanger fin sheet frame, the top of sheet frame be formed with heated on steam admission side end plate steam into
The corresponding heating steam duct in mouthful position, is formed in the lower part of sheet frame and fixed gas exports and condensation-water drain on steam admission side end plate
The corresponding condensed water in position/fixed gas duct is formed respectively with and secondary steam outlet, material liquid outlet and feed liquid in the two sides of sheet frame
The corresponding secondary steam duct of entrance location, discharging duct and charging duct, are equally formed in the four corners of sheet frame and install pull rod
Pull rod location hole；
Wherein, the feed liquid passage sealing ring includes sealing to heat steam hole between board-like diaphragm plate frame and heat exchanger fin sheet frame
Road, secondary steam duct, condensed water/fixed gas duct and the sealing edge for accommodating other ducts in addition to pull rod location hole in sheet frame
Item；Heater steam channel sealing ring includes secondary steam duct between sealing heat exchanger fin sheet frame and heat exchanger fin sheet frame, goes out
Expect duct, charging duct and the sealing edge strip for accommodating other ducts in addition to pull rod location hole in sheet frame；The secondary steam channel
Sealing ring includes that steam duct, discharging duct, cold are heated between sealing steam admission side end plate or steam output side end plate and plate membrane sheet frame
Condensate/fixed gas duct, charging duct and the sealing edge strip for accommodating other ducts in addition to pull rod location hole in sheet frame.
Moreover, the sheet frame is made of polymer plastic or metal, the mesh-supported part is by composition plastics or metal
It is made, the plate membrane being packed on mesh-supported part and heat exchanger fin are to be packed in mesh-supported by being bonded or welded mode
On part, and the edge of plate membrane and heat exchanger fin is by the complete welded closure of square hole among sheet frame.
A kind of application of above-mentioned board-like vacuum membrane distillation evaporator, the application are by multiple board-like vacuum membrane distillation evaporators
For assembled in series at the Multi-effect plate type film distilling seawater desalination system of high-efficiency compact, which includes Mechanical Vapor Compression, vacuum
Pump, seawater feed pump, product water pump, strong brine emptying pump, N number of board-like vacuum membrane distillation evaporator, N-1 header, N number of concentrated water
Flash tank, into packing head and out packing head,
In series, whole device both ends after N number of board-like vacuum membrane distillation evaporator is connected by header between any two
It is sealed with into packing head and out packing head, is then fixed by pull rod respectively, form Multi-effect plate type vacuum membrane distillation device main body, machine
Tool compressor steam inlet is connect with the steam (vapor) outlet of steam output side end socket, the steaming of mechanical compressor steam (vapor) outlet and steam admission side end socket
Vapor inlet connection, constitutes both vapor compression recirculation circuit；
First evaporator condensation-water drain by pipeline via connect into condensing water inlet with first header after packing head, head
A header condensation-water drain condenses water inlet with time header by pipeline and connect, and so connects, until end header condensed water
Import, end header condensation-water drain condense water inlet with steam output side end socket by pipeline and connect, and steam output side end socket condensed water goes out
Mouth is connect by pipeline with product water pump；Other each effect evaporator condensation water outs, are open to corresponding header, make condensed water certainly
It flow in corresponding header；
Seawater feed pump is connect via after steam output side end socket with the liquor inlet of last evaporator by pipeline, end effect evaporation
The material liquid outlet of device is connect via header with the liquor inlet of time last evaporator by pipeline, is so connected, until first effect is steamed
Device is sent out, the material liquid outlet of first evaporator is connect via steam admission side end socket with first concentrated water flash tank concentrated water import by pipeline,
First concentrated water flash tank steam (vapor) outlet is connect by pipeline with first header side wall flash-off steam import, and first concentrated water flash tank is dense
Water out is connect with a time concentrated water flash tank concentrated water import, is so connected, until end concentrated water flash tank, end concentrated water flash tank
Steam (vapor) outlet is connect by pipeline with steam output side end socket side wall flash-off steam import, and end concentrated water flash tank concentrated water outlet passes through pipe
Road and concentrated water discharge pump connect；
The outlet of first evaporator fixed gas by pipeline via into being connect with the fixed gas import of first header after packing head,
The fixed gas outlet of secondary effect evaporator is connect via after header with time fixed gas import of header by pipeline, is so connected,
Until end header fixed gas import, the fixed gas outlet of last evaporator is connected via after last header with vacuum pump by pipeline
It connects.
Moreover, between packing head condensation-water drain and first header, between subsequent header two-by-two and end connection
Non-condensable gas pipe road between case and vacuum pump is further provided with vacuum breaker.
Moreover, between packing head and evaporator, between evaporator and header and evaporator and out between packing head
Connection sealing ring is installed.
The advantages and positive effects of the present invention are:
(1) present invention design by integrated sheet frame and cooperate the sealing ring of different function realize heat steam, feed liquid,
The runners such as secondary steam, condensed water, fixed gas it is highly integrated, the board-like vacuum membrane distillation evaporator for developing formation not only has
Compact-sized, the advantages that being easy to extend, being readily cleaned, it is often more important that by membrane distillation heating vapour-condensing knot and feed liquid evaporation process
Mutually unified, heat is transferred to feed liquid from heating steam in a manner of phase transformation while being transferred to secondary steam in a manner of phase transformation again,
Feed liquid temperature remains unchanged, it is therefore desirable to feed liquid flow it is smaller, power consumption is less.
(2) multiple-effect evaporation is introduced membrane distillation process by the present invention, and multiple board-like vacuum membrane distillation evaporators are sequentially connected in series,
It by vacuum conditions, reduces each effect pressure by effect, implements the multiple-effect of membrane distillation process, i.e., produced previous effect evaporation process
Heating steam of the steam as latter effect evaporation process, realizes that the latent heat of vaporization of steam is repeatedly transmitted in a manner of evaporation-condensation, makes
System water generation ratio and the thermal efficiency significantly increase.
(3) both vapor compression is recycled and introduces multiple-effect membrane distillation process, under conditions of only needing power supply, by end effect film
The secondary steam increasing temperature and pressure generated is distilled, the heat source of membrane distillation is imitated after promotion quality as head, in this way, system no longer needs
It is outer for heating steam and cooling water, and heat-economy with higher.
(4) vacuum pressure that mode maintains each effect plate membrane evaporator for distillation, i.e., the first effect evaporation are vacuumized using series connection
Device fixed gas and micro non-condensing steam drain into 2nd effect evaporator, and steam continues to condense, and 2nd effect evaporator generates not
Solidifying gas and micro non-condensing steam drain into third effect evaporator, and so series connection flows through each effect evaporator, finally evaporate in end effect
Device is enriched with and is discharged by vacuum pump, thus maintains the stability of each effect evaporator vacuum pressure and the flexibility of adjusting, and
It is extracted the steam that coagulates as few as possible outside system.
(5) concentrated water flash tank is sequentially connected in series by pipeline, forms concentrated water multistage flash distillation, discharges concentrated water for membrane distillation
Sensible heat recycling step by step；End socket and header play the role of fresh water flash tank, and are sequentially connected in series by pipeline, shape
At fresh water multistage flash distillation, the recycling step by step of the sensible heat for membrane distillation output fresh water.
Detailed description of the invention
Attached drawing 1 is the schematic diagram of the board-like membrane distillation modular construction of the present invention；
Attached drawing 2 is the schematic perspective view of the right view of the board-like vacuum membrane distillation evaporator of the present invention and right view；
Attached drawing 3 is the structural schematic diagram of steam output side end plate and steam admission side end plate in the present invention；
Attached drawing 4 is the structural schematic diagram of sheet frame in the present invention, plate membrane sheet frame and heat exchanger fin sheet frame；
Attached drawing 5 is feed liquid passage sealing ring in the present invention, heater steam channel sealing ring and secondary steam channel sealing
The structural schematic diagram of circle；
Attached drawing 6 is that board-like vacuum membrane distillation evaporator combines the Multi-effect plate type membrane distillation for being assembled into high-efficiency compact in the present invention
The structural schematic diagram of seawater desalination system；
Attached drawing 7 is the structural schematic diagram that sealing ring is connected in the present invention.
Specific embodiment
Below by way of attached drawing, the present invention is further illustrated, and it is not limited that following embodiment, which is descriptive,
, this does not limit the scope of protection of the present invention.
A kind of board-like vacuum membrane distillation evaporator, as shown in the figures 1 and 2, steam admission side end plate 16 and right side including left side
Steam output side end plate 17 is arranged successively from left to right between steam admission side end plate and steam output side end plate and is equipped with by secondary steam channel
Sealing ring 14, feed liquid passage sealing ring 12, heat exchanger fin sheet frame 32, heater steam channel sealing ring 13, changes plate membrane sheet frame 31
The film block that backing sheet frame 32, feed liquid passage sealing ring 12 and the joint of plate membrane sheet frame 31 are constituted, multiple modules are successively by secondary steaming
Vapour channel sealing ring 14 connects the kernel membrane stack for being arranged to make up Multi-effect plate type film distilling seawater desalination device,
As shown in figure 3, wherein the steam admission side end plate includes that the heating steam inlet 25 on top is arranged in and is arranged under
The condensation-water drain 28 in portion, the top of condensation-water drain are provided with fixed gas outlet 27, are provided with pull rod in steam admission side end plate four corners
Location hole 24 is provided with symmetrical material liquid outlet 26 in steam admission side end plate two sides, wherein the steam output side end plate includes being arranged two
The secondary steam outlet 29 of side is arranged in the liquor inlet 30 of lower part two sides and the pull rod location hole of four corners is arranged in, into vapour
The pull rod location hole of side end panel four corners is corresponding with the pull rod position of positioning hole of steam output side end plate four corners, in the corresponding drawing in position
Bar positioning hole compresses the kernel membrane stack between steam admission side end plate and steam output side end plate after installing pull rod；
As shown in figure 4, the plate membrane sheet frame and heat exchanger fin sheet frame include sheet frame 11, the sheet frame is by polymer plastic
Or metal is made, and square hole is formed among sheet frame, the mesh-supported part 23 affixed with edge is formed in square hole, in mesh-supported
Plate membrane sheet frame is constituted after being fixedly mounted with plate membrane 33 on part, constitutes heat exchanger fin sheet frame after heat exchanger fin 34 is fixedly mounted on mesh-supported part,
It is formed with heating steam duct 18 corresponding with steam inlet position is heated on steam admission side end plate on the top of sheet frame, in the upper of sheet frame
Portion is formed with condensed water/fixed gas duct 22 corresponding with fixed gas outlet on steam admission side end plate and condensation-water drain position, in plate
The two sides of frame are formed respectively with secondary steam duct 20 corresponding with secondary steam outlet, material liquid outlet and liquor inlet position, go out
Expect duct 19 and charging duct 21, the pull rod location hole for installing pull rod is again provided in the four corners of sheet frame；
In specific implementation of the invention, the plate membrane being packed on mesh-supported part and heat exchanger fin are to pass through welding
Mode is packed on mesh-supported part, and the edge of plate membrane and heat exchanger fin dares square hole among sheet frame to connect closing completely.
As shown in figure 5, the feed liquid passage sealing ring includes sealing to heat between board-like diaphragm plate frame and heat exchanger fin sheet frame to steam
Steam vent road, secondary steam duct, condensed water/fixed gas duct and the sealing for accommodating other ducts in addition to pull rod location hole in sheet frame
Edge strip；Heater steam channel sealing ring include sealing heat exchanger fin sheet frame and heat exchanger fin sheet frame between secondary steam duct,
Discharge duct, charging duct and the sealing edge strip for accommodating other ducts in addition to pull rod location hole in sheet frame；The secondary steam is logical
Road sealing ring include sealing steam admission side end plate or steam output side end plate and plate membrane sheet frame between heat steam duct, discharging duct,
Condensed water/fixed gas duct, charging duct and the sealing edge strip for accommodating other ducts in addition to pull rod location hole in sheet frame；
After a whole set of desalination plant assembles, as shown in Figure 1, in steam admission side end plate or steam output side end plate and board-like diaphragm plate
Secondary steam channel 35 is formed between frame or between plate membrane sheet frame and plate membrane sheet frame, in plate membrane sheet frame and heat exchange sheet
Feed liquid passage 36 is formed between frame, is formed heating steam channel 37 between heat exchanger fin sheet frame and heat exchanger fin sheet frame, is heated steam
Being entered by steam admission side end plate, secondary steam is discharged by steam output side end plate, and whom feeds and is entered by steam output side end plate, strong brine, condensation
Fresh water and fixed gas are discharged by steam admission side end plate.
A kind of application of above-mentioned board-like vacuum membrane distillation evaporator, as shown in fig. 6, the application is by board-like vacuum membrane distillation
Evaporator combines the Multi-effect plate type film distilling seawater desalination system for being assembled into high-efficiency compact, which includes Mechanical Vapor Compression
1, vacuum pump 7, seawater feed pump 8, product water pump 9, strong brine emptying pump 10, N number of board-like vacuum membrane distillation evaporator 2, N-1
Header 3, N number of concentrated water flash tank 6, into packing head 4 and out packing head 5,
N number of board-like vacuum membrane distillation evaporator is in series after being connected between any two by header, and preceding effect evaporator goes out
Vapour side end panel corresponds to aftereffect evaporator steam admission side end plate after passing through header, and whole device both ends are respectively with into packing head and out packing
Head sealing, is then fixed by pull rod, forms Multi-effect plate type vacuum membrane distillation device main body, mechanical compressor steam inlet and vapour out
The steam (vapor) outlet of side seal head connects, and mechanical compressor steam (vapor) outlet is connect with the steam inlet of steam admission side end socket, constitutes vapour pressure
Contracting recirculation circuit；
First evaporator condensation-water drain by pipeline via connect into condensing water inlet with first header after packing head, head
A header condensation-water drain condenses water inlet with time header by pipeline and connect, and so connects, until end header condensed water
Import, end header condensation-water drain condense water inlet with steam output side end socket by pipeline and connect, and steam output side end socket condensed water goes out
Mouth is connect by pipeline with product water pump；Other each effect evaporator condensation water outs, are open to corresponding header, make condensed water certainly
It flow in corresponding header；
In specific implementation of the invention, as shown in fig. 6, non-condensable gas pipe road is provided with vacuum breaker.
Seawater feed pump is connected by pipeline via the liquor inlet of steam output side end socket and last evaporator, last evaporator
Material liquid outlet connect by association's internal duct with the liquor inlet of time last evaporator, in this way, up to first evaporator, head
The material liquid outlet for imitating evaporator is connected by pipeline and the outlet of steam admission side end socket concentrated water；
The outlet of steam admission side end socket concentrated water is connect by pipeline with first concentrated water flash tank concentrated water import, first concentrated water flash tank
Steam (vapor) outlet is connect by pipeline with first header side wall flash-off steam import, and first concentrated water flash tank concentrated water exports and secondary dense
Water flash tank concentrated water import connection, in this way, until end concentrated water flash tank, end concentrated water flash tank steam (vapor) outlet by pipeline with
Flash-off steam import connection on packing head side wall out, end concentrated water flash tank concentrated water outlet are connected by pipeline and concentrated water discharge pump
It connects；
Fixed gas outlet in head effect plate membrane evaporator for distillation via into after packing head with first header by not coagulating
The fixed gas outlet of gas import connection, first header is connect by pipeline with time fixed gas import of header, meanwhile, secondary effect plate
Fixed gas outlet in formula membrane distillation evaporator is exported by the fixed gas of pipeline and time header to be connected, in this way, until end
The fixed gas outlet of header fixed gas import, end header is controlled to a vacuum pump by pipeline；
In specific implementation of the invention, between packing head and evaporator, between evaporator and header and evaporate
Connection sealing ring 15 as shown in Figure 7 is installed between device and out packing head.
In specific implementation of the invention, the Mechanical Vapor Compression be centrifugal compressor, lobed rotor compressor or
Helical-lobe compressor.
Working principle
Feed liquid enters the charging of each sheet frame in the board-like vacuum membrane distillation evaporator of end effect by feed pump from liquor inlet
Duct, under the action of feed liquid passage sealing ring, feed liquid is only entered is led to by the feed liquid between plate membrane sheet frame and heat exchanger fin sheet frame
Road, and the duct of flow direction discharging from bottom to top are entered heat exchanger fin sheet frame and are changed by what is generated from preceding effect evaporator in the process
The secondary steam for preheating of heating steam channel between backing sheet frame, it is secondary between plate membrane sheet frame and plate membrane sheet frame at this time
Steam channel keeps certain negative pressure, and when feed liquid reaches with saturation temperature corresponding to secondary steam channel negative pressure, feed liquid exists
The evaporation of plate membrane micropore surface, evaporated vapor pass through fenestra and enter secondary steam channel and injection to vapour compression machine import；Into
After entering stable state, feed liquid side is heated, and side is evaporated concentration, and keeps own temperature constant, most afterwards through discharge hole road
It is discharged from material liquid outlet, then adverse current enters the preceding board-like vacuum membrane distillation evaporator of effect, repeats the above process, and carries out film steaming by effect
Evaporation and concentration is evaporated, is finally discharged from first evaporator；High temperature and high salt solution after discharge flows into multiple concentrated water flash tanks step by step and dodges
It steams, flash-off steam enters the heating steam channel of corresponding evaporator, the heating steam as membrane distillation process.
The secondary steam that last evaporator generates is delivered to first evaporator, close after vapour compression machine promotes quality
Under the action of seal, the heating steam channel between heat exchanger fin sheet frame and heat exchanger fin sheet frame is only entered, as heating steam, heating
Feed liquid in feed liquid passage simultaneously is allowed to carry out membrane distillation, itself is condensed into fresh water, and condensed water/fixed gas is flowed into together with fixed gas
Duct；First evaporator condensed water flows into steam admission side end socket from condensation-water drain, then passes through pipe under the action of pressure difference between effect
Road flows through each header flash distillation step by step, and flash steam enters the evaporator of corresponding effect, as heating steam；Fixed gas and it is micro not
The never solidifying port discharge of condensing vapour, flow to the heating steam channel of lower effective evaporator under the suction of the vacuum pump, steam condensation,
The fixed gas and micro non-condensing steam that remaining fixed gas and lower effective evaporator generate are exported from lower effect fixed gas to be discharged, so
Series connection flows through each effect evaporator, is finally discharged from last evaporator stream by vacuum pump；The secondary steam that first evaporator generates,
The heating steam channel for entering 2nd effect evaporator between effect under the action of pressure difference, with fresh water flash-off steam and concentrated water flash-off steam one
Road as heating steam heating feed liquid passage feed liquid and be allowed to carry out membrane distillation evaporation and concentration, itself is condensed into fresh water, from the
The condensation-water drain of 2nd effect evaporator is discharged, and after then converging in header with the fresh water from first evaporator, is then imitating
Between each header flash distillation is flowed through by pipeline step by step under the action of pressure difference, flash steam enters the evaporator of corresponding effect, as heating
Steam.Heating steam of the secondary steam that 2nd effect evaporator generates as third effect evaporator, what third effect evaporator generated
Heating steam of the secondary steam as fourth evaporator so repeats, until last evaporator, is carried out continuously multiple-effect film in this way
Distillation and both vapor compression recycling.
When Multi-effect plate type vacuum membrane distillation device initial start, need by outer for steam, after stable, Ji Keqi
With vapour compression machine, and no longer need outer for steam.Above-mentioned Multi-effect plate type vacuum membrane distillation method is based on enabling both vapor compression
Operation description afterwards.
Claims (5)
1. a kind of board-like vacuum membrane distillation evaporator, it is characterised in that: the steam output side of steam admission side end plate and right side including left side
End plate is arranged successively from left to right between steam admission side end plate and steam output side end plate and is equipped with by plate membrane sheet frame, feed liquid passage
Sealing ring, heat exchanger fin sheet frame, heater steam channel sealing ring, heat exchanger fin sheet frame, feed liquid passage sealing ring and plate membrane sheet frame
Combine the film block constituted, multiple modules are successively arranged to make up membrane stack by the connection of secondary steam channel sealing ring；Membrane stack and steam admission side
End plate is also connected with secondary steam channel sealing ring with steam output side end plate；
Wherein, the steam admission side end plate includes the heating steam inlet that top is arranged in and the condensation-water drain that lower part is arranged in,
The top of condensation-water drain is provided with fixed gas outlet, pull rod location hole is provided in steam admission side end plate four corners, in steam admission side end plate
Two sides are provided with symmetrical material liquid outlet；Wherein, the steam output side end plate includes the secondary steam outlet that two sides are arranged in, is arranged
The liquor inlet of lower part two sides and the pull rod location hole that four corners are set, the pull rod location hole of steam admission side end plate four corners with go out
The pull rod position of positioning hole of vapour side end panel four corners is corresponding, and in position, corresponding pull rod positioning hole is installed steam admission side after pull rod
Kernel membrane stack between end plate and steam output side end plate compresses；
Wherein, the plate membrane sheet frame and heat exchanger fin sheet frame include sheet frame, and square hole is formed among sheet frame, is formed in square hole
The mesh-supported part affixed with square hole edge constitutes plate membrane sheet frame after being fixedly mounted with plate membrane on mesh-supported part, in netted branch
Heat exchanger fin sheet frame is constituted after being fixedly mounted with heat exchanger fin in support member, be formed on the top of sheet frame and heats steam inlet position on steam admission side end plate
Corresponding heating steam duct is set, is formed with and fixed gas outlet and condensation-water drain position on steam admission side end plate in the lower part of sheet frame
Corresponding condensed water/fixed gas duct is formed respectively with and secondary steam outlet, material liquid outlet and liquor inlet in the two sides of sheet frame
The corresponding secondary steam duct in position, discharging duct and charging duct, the drawing for installing pull rod is equally formed in the four corners of sheet frame
Bar location hole；Wherein, the feed liquid passage sealing ring includes sealing to heat steam hole between board-like diaphragm plate frame and heat exchanger fin sheet frame
Road, secondary steam duct, condensed water/fixed gas duct and the sealing edge for accommodating other ducts in addition to pull rod location hole in sheet frame
Item；Heater steam channel sealing ring includes secondary steam duct between sealing heat exchanger fin sheet frame and heat exchanger fin sheet frame, goes out
Expect duct, charging duct and the sealing edge strip for accommodating other ducts in addition to pull rod location hole in sheet frame；The secondary steam channel
Sealing ring includes that steam duct, discharging duct, cold are heated between sealing steam admission side end plate or steam output side end plate and plate membrane sheet frame
Condensate/fixed gas duct, charging duct and the sealing edge strip for accommodating other ducts in addition to pull rod location hole in sheet frame.
2. board-like vacuum membrane distillation evaporator according to claim 1, it is characterised in that: the sheet frame is by polymer plastic
Or metal is made, the mesh-supported part is made of composition plastics or metal, it is described be packed in it is board-like on mesh-supported part
Film and heat exchanger fin are to be packed on mesh-supported part by being bonded or welded mode, and the edge of plate membrane and heat exchanger fin is by plate
The complete welded closure of square hole among frame.
3. a kind of a kind of application method of board-like vacuum membrane distillation evaporator according to claim 1, it is characterised in that: will
Multiple board-like vacuum membrane distillation evaporator series are assembled into the Multi-effect plate type film distilling seawater desalination system of high-efficiency compact, the system
Including Mechanical Vapor Compression, vacuum pump, seawater feed pump, product water pump, strong brine emptying pump, N number of board-like vacuum membrane distillation
Evaporator, N-1 header, N number of concentrated water flash tank, into packing head and out packing head；
N number of board-like vacuum membrane distillation evaporator is in series after being connected between any two by header, whole device both ends difference
It is sealed with into packing head and out packing head, is then fixed by pull rod, form Multi-effect plate type vacuum membrane distillation device main body, machinery pressure
Contracting machine steam inlet is connect with the steam (vapor) outlet of steam output side end socket, the steam of mechanical compressor steam (vapor) outlet and steam admission side end socket into
Mouth connection, constitutes both vapor compression recirculation circuit；
First evaporator condensation-water drain by pipeline via connecting into condensing water inlet with first header after packing head, it is first
Case condensation-water drain condenses water inlet with time header by pipeline and connect, and so connects, until end header condenses water inlet,
Last header condensation-water drain condenses water inlet with steam output side end socket by pipeline and connect, and steam output side end socket condensation-water drain passes through
Pipeline is connect with product water pump；Other each effect evaporator condensation water outs, are open to corresponding header, make condensed water from flowing to pair
In the header answered；
Seawater feed pump is connect via after steam output side end socket with the liquor inlet of last evaporator by pipeline, last evaporator
Material liquid outlet is connect via header with the liquor inlet of time last evaporator by pipeline, is so connected, until first evaporator,
The material liquid outlet of first evaporator is connect via steam admission side end socket with first concentrated water flash tank concentrated water import by pipeline, first dense
Water flash tank steam (vapor) outlet is connect by pipeline with first header side wall flash-off steam import, first concentrated water flash tank concentrated water outlet
It connect with secondary a concentrated water flash tank concentrated water import, so connects, until end concentrated water flash tank, end concentrated water flash tank steam goes out
Mouthful connect with steam output side end socket side wall flash-off steam import by pipeline, end concentrated water flash tank concentrated water export pass through pipeline with it is dense
The connection of water emptying pump；
The outlet of first evaporator fixed gas by pipeline via into being connect with the fixed gas import of first header after packing head, secondary effect
The fixed gas outlet of evaporator is connect via after header with time fixed gas import of header by pipeline, is so connected, until
Last header fixed gas import, the fixed gas outlet of last evaporator is by pipeline via being controlled to a vacuum pump after last header.
4. the application of board-like vacuum membrane distillation evaporator according to claim 3, it is characterised in that: condensed into packing head
Non-condensable gas pipe road between water out and first header, between subsequent header two-by-two and between end header and vacuum pump
It is further provided with vacuum breaker.
5. the application of board-like vacuum membrane distillation evaporator according to claim 3, it is characterised in that: into packing head and steam
Between hair device, between evaporator and header and evaporator and between packing head connection sealing ring is installed out.
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Cited By (1)
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| WO2022023862A1 (en) * | 2020-07-27 | 2022-02-03 | King Abdullah University Of Science And Technology | Multi-stage membrane distillation device and method |
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| WO2018232709A1 (en) * | 2017-06-22 | 2018-12-27 | 梅杰布拉沃有限公司 | Multistage flash evaporation device |
| US9968865B1 (en) * | 2017-08-25 | 2018-05-15 | Wei Wu | Multiple effect with vapor compression distillation apparatus |
| CN108067100A (en) * | 2017-12-29 | 2018-05-25 | 北京中科瑞升资源环境技术有限公司 | Rolled film distillation equipment and use its membrane distillation system |
| CN108211801A (en) * | 2018-03-07 | 2018-06-29 | 北京天地人环保科技有限公司 | A kind of multiple-effect distillation device, system and method |
| CN109879490B (en) * | 2019-02-20 | 2021-06-08 | 河海大学 | Capacitive degreasing film distillation system |
| CN111001300B (en) * | 2019-12-31 | 2022-03-25 | 广东栗子科技有限公司 | Preparation method of high-sealing-performance electrodialysis membrane stack |
| CN111453798A (en) * | 2020-03-13 | 2020-07-28 | 天津上德环境科技有限公司 | Seawater distillation desalination system based on multistage evaporator |
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